Initial import of KTH eBones. This has been cleaned up to only include

the "core" Kerberos functionality. The rest of the userland will get their
own changes later.

1 files changed, 2076 insertions, 0 deletions

diff --git a/crypto/kerberosIV/appl/ftp/ftpd/ftpd.c b/crypto/kerberosIV/appl/ftp/ftpd/ftpd.c
new file mode 100644
index 0000000..17cd3b9
--- /dev/null
+++ b/crypto/kerberosIV/appl/ftp/ftpd/ftpd.c
@@ -0,0 +1,2076 @@
+/*
+ * Copyright (c) 1985, 1988, 1990, 1992, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+RCSID("$Id: ftpd.c,v 1.88 1997/06/01 03:13:48 assar Exp $");
+#endif
+
+/*
+ * FTP server.
+ */
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+#ifdef HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#if defined(HAVE_SYS_IOCTL_H) && SunOS != 4
+#include <sys/ioctl.h>
+#endif
+#ifdef TIME_WITH_SYS_TIME
+#include <sys/time.h>
+#include <time.h>
+#elif defined(HAVE_SYS_TIME_H)
+#include <sys/time.h>
+#else
+#include <time.h>
+#endif
+#ifdef HAVE_SYS_RESOURCE_H
+#include <sys/resource.h>
+#endif
+#ifdef HAVE_SYS_WAIT_H
+#include <sys/wait.h>
+#endif
+
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+#ifdef HAVE_NETINET_IN_SYSTM_H
+#include <netinet/in_systm.h>
+#endif
+#ifdef HAVE_NETINET_IP_H
+#include <netinet/ip.h>
+#endif
+
+#ifdef HAVE_SYS_MMAN_H
+#include <sys/mman.h>
+#endif
+
+#define	FTP_NAMES
+#include <arpa/ftp.h>
+#ifdef HAVE_ARPA_INET_H
+#include <arpa/inet.h>
+#endif
+#ifdef HAVE_ARPA_TELNET_H
+#include <arpa/telnet.h>
+#endif
+
+#include <ctype.h>
+#ifdef HAVE_DIRENT_H
+#include <dirent.h>
+#endif
+#include <errno.h>
+#ifdef HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
+#include <glob.h>
+#include <limits.h>
+#ifdef HAVE_PWD_H
+#include <pwd.h>
+#endif
+#include <setjmp.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#ifdef HAVE_SYSLOG_H
+#include <syslog.h>
+#endif
+#include <time.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#ifdef HAVE_GRP_H
+#include <grp.h>
+#endif
+
+#include <err.h>
+
+#include "pathnames.h"
+#include "extern.h"
+#include "common.h"
+
+#include "auth.h"
+
+#include <krb.h>
+
+#include <kafs.h>
+#include "roken.h"
+
+#include <otp.h>
+
+#ifdef SOCKS
+#include <socks.h>
+extern int LIBPREFIX(fclose)      __P((FILE *));
+#endif
+
+void yyparse();
+
+#ifndef LOG_FTP
+#define LOG_FTP LOG_DAEMON
+#endif
+
+static char version[] = "Version 6.00";
+
+extern	off_t restart_point;
+extern	char cbuf[];
+
+struct	sockaddr_in ctrl_addr;
+struct	sockaddr_in data_source;
+struct	sockaddr_in data_dest;
+struct	sockaddr_in his_addr;
+struct	sockaddr_in pasv_addr;
+
+int	data;
+jmp_buf	errcatch, urgcatch;
+int	oobflag;
+int	logged_in;
+struct	passwd *pw;
+int	debug;
+int	ftpd_timeout = 900;    /* timeout after 15 minutes of inactivity */
+int	maxtimeout = 7200;/* don't allow idle time to be set beyond 2 hours */
+int	logging;
+int	guest;
+int	dochroot;
+int	type;
+int	form;
+int	stru;			/* avoid C keyword */
+int	mode;
+int	usedefault = 1;		/* for data transfers */
+int	pdata = -1;		/* for passive mode */
+int	transflag;
+off_t	file_size;
+off_t	byte_count;
+#if !defined(CMASK) || CMASK == 0
+#undef CMASK
+#define CMASK 027
+#endif
+int	defumask = CMASK;		/* default umask value */
+int	guest_umask = 0777;	/* Paranoia for anonymous users */
+char	tmpline[10240];
+char	hostname[MaxHostNameLen];
+char	remotehost[MaxHostNameLen];
+static char ttyline[20];
+
+#define AUTH_PLAIN	(1 << 0) /* allow sending passwords */
+#define AUTH_OTP	(1 << 1) /* passwords are one-time */
+#define AUTH_FTP	(1 << 2) /* allow anonymous login */
+
+static int auth_level = 0; /* Only allow kerberos login by default */
+
+/*
+ * Timeout intervals for retrying connections
+ * to hosts that don't accept PORT cmds.  This
+ * is a kludge, but given the problems with TCP...
+ */
+#define	SWAITMAX	90	/* wait at most 90 seconds */
+#define	SWAITINT	5	/* interval between retries */
+
+int	swaitmax = SWAITMAX;
+int	swaitint = SWAITINT;
+
+#ifdef HAVE_SETPROCTITLE
+char	proctitle[BUFSIZ];	/* initial part of title */
+#endif /* HAVE_SETPROCTITLE */
+
+#define LOGCMD(cmd, file) \
+	if (logging > 1) \
+	    syslog(LOG_INFO,"%s %s%s", cmd, \
+		*(file) == '/' ? "" : curdir(), file);
+#define LOGCMD2(cmd, file1, file2) \
+	 if (logging > 1) \
+	    syslog(LOG_INFO,"%s %s%s %s%s", cmd, \
+		*(file1) == '/' ? "" : curdir(), file1, \
+		*(file2) == '/' ? "" : curdir(), file2);
+#define LOGBYTES(cmd, file, cnt) \
+	if (logging > 1) { \
+		if (cnt == (off_t)-1) \
+		    syslog(LOG_INFO,"%s %s%s", cmd, \
+			*(file) == '/' ? "" : curdir(), file); \
+		else \
+		    syslog(LOG_INFO, "%s %s%s = %ld bytes", \
+			cmd, (*(file) == '/') ? "" : curdir(), file, (long)cnt); \
+	}
+
+static void	 ack (char *);
+static void	 myoob (int);
+static int	 checkuser (char *, char *);
+static int	 checkaccess (char *);
+static FILE	*dataconn (char *, off_t, char *);
+static void	 dolog (struct sockaddr_in *);
+static void	 end_login (void);
+static FILE	*getdatasock (char *);
+static char	*gunique (char *);
+static RETSIGTYPE	 lostconn (int);
+static int	 receive_data (FILE *, FILE *);
+static void	 send_data (FILE *, FILE *);
+static struct passwd * sgetpwnam (char *);
+static void	 usage(void);
+
+static char *
+curdir(void)
+{
+	static char path[MaxPathLen+1+1];	/* path + '/' + '\0' */
+
+	if (getcwd(path, sizeof(path)-2) == NULL)
+		return ("");
+	if (path[1] != '\0')		/* special case for root dir. */
+		strcat(path, "/");
+	/* For guest account, skip / since it's chrooted */
+	return (guest ? path+1 : path);
+}
+
+#ifndef LINE_MAX
+#define LINE_MAX 1024
+#endif
+
+static int
+parse_auth_level(char *str)
+{
+    char *p;
+    int ret = 0;
+    char *foo = NULL;
+
+    for(p = strtok_r(str, ",", &foo);
+	p;
+	p = strtok_r(NULL, ",", &foo)) {
+	if(strcmp(p, "user") == 0)
+	    ;
+	else if(strcmp(p, "otp") == 0)
+	    ret |= AUTH_PLAIN|AUTH_OTP;
+	else if(strcmp(p, "ftp") == 0 ||
+		strcmp(p, "safe") == 0)
+	    ret |= AUTH_FTP;
+	else if(strcmp(p, "plain") == 0)
+	    ret |= AUTH_PLAIN;
+	else if(strcmp(p, "none") == 0)
+	    ret |= AUTH_PLAIN|AUTH_FTP;
+	else
+	    warnx("bad value for -a: `%s'", p);
+    }
+    return ret;	    
+}
+
+/*
+ * Print usage and die.
+ */
+
+static void
+usage (void)
+{
+    fprintf (stderr,
+	     "Usage: %s [-d] [-i] [-g guest_umask] [-l] [-p port]"
+	     " [-t timeout] [-T max_timeout] [-u umask] [-v]"
+	     " [-a auth_level] \n",
+	     __progname);
+    exit (1);
+}
+
+int
+main(int argc, char **argv)
+{
+	int addrlen, ch, on = 1, tos;
+	char *cp, line[LINE_MAX];
+	FILE *fd;
+	int not_inetd = 0;
+	int port;
+	struct servent *sp;
+	char tkfile[1024];
+
+	set_progname (argv[0]);
+
+	/* detach from any tickets and tokens */
+
+	snprintf(tkfile, sizeof(tkfile),
+		 "/tmp/ftp_%u", (unsigned)getpid());
+	krb_set_tkt_string(tkfile);
+	if(k_hasafs())
+	    k_setpag();
+
+	sp = getservbyname("ftp", "tcp");
+	if(sp)
+	    port = sp->s_port;
+	else
+	    port = htons(21);
+
+	while ((ch = getopt(argc, argv, "a:dg:ilp:t:T:u:v")) != EOF) {
+		switch (ch) {
+		case 'a':
+		    auth_level = parse_auth_level(optarg);
+		    break;
+		case 'd':
+		    debug = 1;
+		    break;
+
+		case 'i':
+		    not_inetd = 1;
+		    break;
+		case 'g':
+		    {
+			long val = 0;
+
+			val = strtol(optarg, &optarg, 8);
+			if (*optarg != '\0' || val < 0)
+			    warnx("bad value for -g");
+			else
+			    guest_umask = val;
+			break;
+		    }
+		case 'l':
+		    logging++;	/* > 1 == extra logging */
+		    break;
+
+		case 'p':
+		    sp = getservbyname(optarg, "tcp");
+		    if(sp)
+			port = sp->s_port;
+		    else
+			if(isdigit(optarg[0]))
+			    port = htons(atoi(optarg));
+			else
+			    warnx("bad value for -p");
+		    break;
+		    
+		case 't':
+		    ftpd_timeout = atoi(optarg);
+		    if (maxtimeout < ftpd_timeout)
+			maxtimeout = ftpd_timeout;
+		    break;
+
+		case 'T':
+		    maxtimeout = atoi(optarg);
+		    if (ftpd_timeout > maxtimeout)
+			ftpd_timeout = maxtimeout;
+		    break;
+
+		case 'u':
+		    {
+			long val = 0;
+
+			val = strtol(optarg, &optarg, 8);
+			if (*optarg != '\0' || val < 0)
+			    warnx("bad value for -u");
+			else
+			    defumask = val;
+			break;
+		    }
+
+		case 'v':
+		    debug = 1;
+		    break;
+
+		default:
+		    usage ();
+		}
+	}
+
+	if(not_inetd)
+	    mini_inetd (port);
+
+	/*
+	 * LOG_NDELAY sets up the logging connection immediately,
+	 * necessary for anonymous ftp's that chroot and can't do it later.
+	 */
+	openlog("ftpd", LOG_PID | LOG_NDELAY, LOG_FTP);
+	addrlen = sizeof(his_addr);
+	if (getpeername(0, (struct sockaddr *)&his_addr, &addrlen) < 0) {
+		syslog(LOG_ERR, "getpeername (%s): %m",argv[0]);
+		exit(1);
+	}
+	addrlen = sizeof(ctrl_addr);
+	if (getsockname(0, (struct sockaddr *)&ctrl_addr, &addrlen) < 0) {
+		syslog(LOG_ERR, "getsockname (%s): %m",argv[0]);
+		exit(1);
+	}
+#if defined(IP_TOS) && defined(HAVE_SETSOCKOPT)
+	tos = IPTOS_LOWDELAY;
+	if (setsockopt(0, IPPROTO_IP, IP_TOS, (void *)&tos, sizeof(int)) < 0)
+		syslog(LOG_WARNING, "setsockopt (IP_TOS): %m");
+#endif
+	data_source.sin_port = htons(ntohs(ctrl_addr.sin_port) - 1);
+	debug = 0;
+
+	/* set this here so it can be put in wtmp */
+	snprintf(ttyline, sizeof(ttyline), "ftp%u", (unsigned)getpid());
+
+
+	/*	freopen(_PATH_DEVNULL, "w", stderr); */
+	signal(SIGPIPE, lostconn);
+	signal(SIGCHLD, SIG_IGN);
+#ifdef SIGURG
+	if (signal(SIGURG, myoob) == SIG_ERR)
+	    syslog(LOG_ERR, "signal: %m");
+#endif
+
+	auth_init();
+
+	/* Try to handle urgent data inline */
+#if defined(SO_OOBINLINE) && defined(HAVE_SETSOCKOPT)
+	if (setsockopt(0, SOL_SOCKET, SO_OOBINLINE, (void *)&on,
+		       sizeof(on)) < 0)
+		syslog(LOG_ERR, "setsockopt: %m");
+#endif
+
+#ifdef	F_SETOWN
+	if (fcntl(fileno(stdin), F_SETOWN, getpid()) == -1)
+		syslog(LOG_ERR, "fcntl F_SETOWN: %m");
+#endif
+	dolog(&his_addr);
+	/*
+	 * Set up default state
+	 */
+	data = -1;
+	type = TYPE_A;
+	form = FORM_N;
+	stru = STRU_F;
+	mode = MODE_S;
+	tmpline[0] = '\0';
+
+	/* If logins are disabled, print out the message. */
+	if ((fd = fopen(_PATH_NOLOGIN,"r")) != NULL) {
+		while (fgets(line, sizeof(line), fd) != NULL) {
+			if ((cp = strchr(line, '\n')) != NULL)
+				*cp = '\0';
+			lreply(530, "%s", line);
+		}
+		fflush(stdout);
+		fclose(fd);
+		reply(530, "System not available.");
+		exit(0);
+	}
+	if ((fd = fopen(_PATH_FTPWELCOME, "r")) != NULL) {
+		while (fgets(line, sizeof(line), fd) != NULL) {
+			if ((cp = strchr(line, '\n')) != NULL)
+				*cp = '\0';
+			lreply(220, "%s", line);
+		}
+		fflush(stdout);
+		fclose(fd);
+		/* reply(220,) must follow */
+	}
+	k_gethostname(hostname, sizeof(hostname));
+	reply(220, "%s FTP server (%s+%s) ready.", hostname, 
+	      version, krb4_version);
+	setjmp(errcatch);
+	for (;;)
+	    yyparse();
+	/* NOTREACHED */
+}
+
+static RETSIGTYPE
+lostconn(int signo)
+{
+
+	if (debug)
+		syslog(LOG_DEBUG, "lost connection");
+	dologout(-1);
+}
+
+/*
+ * Helper function for sgetpwnam().
+ */
+static char *
+sgetsave(char *s)
+{
+	char *new = strdup(s);
+
+	if (new == NULL) {
+		perror_reply(421, "Local resource failure: malloc");
+		dologout(1);
+		/* NOTREACHED */
+	}
+	return new;
+}
+
+/*
+ * Save the result of a getpwnam.  Used for USER command, since
+ * the data returned must not be clobbered by any other command
+ * (e.g., globbing).
+ */
+static struct passwd *
+sgetpwnam(char *name)
+{
+	static struct passwd save;
+	struct passwd *p;
+
+	if ((p = k_getpwnam(name)) == NULL)
+		return (p);
+	if (save.pw_name) {
+		free(save.pw_name);
+		free(save.pw_passwd);
+		free(save.pw_gecos);
+		free(save.pw_dir);
+		free(save.pw_shell);
+	}
+	save = *p;
+	save.pw_name = sgetsave(p->pw_name);
+	save.pw_passwd = sgetsave(p->pw_passwd);
+	save.pw_gecos = sgetsave(p->pw_gecos);
+	save.pw_dir = sgetsave(p->pw_dir);
+	save.pw_shell = sgetsave(p->pw_shell);
+	return (&save);
+}
+
+static int login_attempts;	/* number of failed login attempts */
+static int askpasswd;		/* had user command, ask for passwd */
+static char curname[10];	/* current USER name */
+OtpContext otp_ctx;
+
+/*
+ * USER command.
+ * Sets global passwd pointer pw if named account exists and is acceptable;
+ * sets askpasswd if a PASS command is expected.  If logged in previously,
+ * need to reset state.  If name is "ftp" or "anonymous", the name is not in
+ * _PATH_FTPUSERS, and ftp account exists, set guest and pw, then just return.
+ * If account doesn't exist, ask for passwd anyway.  Otherwise, check user
+ * requesting login privileges.  Disallow anyone who does not have a standard
+ * shell as returned by getusershell().  Disallow anyone mentioned in the file
+ * _PATH_FTPUSERS to allow people such as root and uucp to be avoided.
+ */
+void
+user(char *name)
+{
+	char *cp, *shell;
+
+	if(auth_level == 0 && !auth_complete){
+	    reply(530, "No login allowed without authorization.");
+	    return;
+	}
+
+	if (logged_in) {
+		if (guest) {
+			reply(530, "Can't change user from guest login.");
+			return;
+		} else if (dochroot) {
+			reply(530, "Can't change user from chroot user.");
+			return;
+		}
+		end_login();
+	}
+
+	guest = 0;
+	if (strcmp(name, "ftp") == 0 || strcmp(name, "anonymous") == 0) {
+	    if ((auth_level & AUTH_FTP) == 0 ||
+		checkaccess("ftp") || 
+		checkaccess("anonymous"))
+		reply(530, "User %s access denied.", name);
+	    else if ((pw = sgetpwnam("ftp")) != NULL) {
+		guest = 1;
+		defumask = guest_umask;	/* paranoia for incoming */
+		askpasswd = 1;
+		reply(331, "Guest login ok, type your name as password.");
+	    } else
+		reply(530, "User %s unknown.", name);
+	    if (!askpasswd && logging)
+		syslog(LOG_NOTICE,
+		       "ANONYMOUS FTP LOGIN REFUSED FROM %s(%s)",
+		       remotehost, inet_ntoa(his_addr.sin_addr));
+	    return;
+	}
+	if((auth_level & AUTH_PLAIN) == 0 && !auth_complete){
+	    reply(530, "Only authorized and anonymous login allowed.");
+	    return;
+	}
+	if ((pw = sgetpwnam(name))) {
+		if ((shell = pw->pw_shell) == NULL || *shell == 0)
+			shell = _PATH_BSHELL;
+		while ((cp = getusershell()) != NULL)
+			if (strcmp(cp, shell) == 0)
+				break;
+		endusershell();
+
+		if (cp == NULL || checkaccess(name)) {
+			reply(530, "User %s access denied.", name);
+			if (logging)
+				syslog(LOG_NOTICE,
+				       "FTP LOGIN REFUSED FROM %s(%s), %s",
+				       remotehost,
+				       inet_ntoa(his_addr.sin_addr),
+				       name);
+			pw = (struct passwd *) NULL;
+			return;
+		}
+	}
+	if (logging)
+		strncpy(curname, name, sizeof(curname)-1);
+	if(auth_ok())
+		ct->userok(name);
+	else {
+		char ss[256];
+
+		if (otp_challenge(&otp_ctx, name, ss, sizeof(ss)) == 0) {
+			reply(331, "Password %s for %s required.",
+			      ss, name);
+			askpasswd = 1;
+		} else if ((auth_level & AUTH_OTP) == 0) {
+		    reply(331, "Password required for %s.", name);
+		    askpasswd = 1;
+		} else {
+		    char *s;
+		    
+		    if (s = otp_error (&otp_ctx))
+			lreply(530, "OTP: %s", s);
+		    reply(530,
+			  "Only authorized, anonymous and OTP "
+			  "login allowed.");
+		}
+
+	}
+	/*
+	 * Delay before reading passwd after first failed
+	 * attempt to slow down passwd-guessing programs.
+	 */
+	if (login_attempts)
+		sleep(login_attempts);
+}
+
+/*
+ * Check if a user is in the file "fname"
+ */
+static int
+checkuser(char *fname, char *name)
+{
+	FILE *fd;
+	int found = 0;
+	char *p, line[BUFSIZ];
+
+	if ((fd = fopen(fname, "r")) != NULL) {
+		while (fgets(line, sizeof(line), fd) != NULL)
+			if ((p = strchr(line, '\n')) != NULL) {
+				*p = '\0';
+				if (line[0] == '#')
+					continue;
+				if (strcmp(line, name) == 0) {
+					found = 1;
+					break;
+				}
+			}
+		fclose(fd);
+	}
+	return (found);
+}
+
+
+/*
+ * Determine whether a user has access, based on information in 
+ * _PATH_FTPUSERS. The users are listed one per line, with `allow'
+ * or `deny' after the username. If anything other than `allow', or
+ * just nothing, is given after the username, `deny' is assumed.
+ *
+ * If the user is not found in the file, but the pseudo-user `*' is,
+ * the permission is taken from that line.
+ *
+ * This preserves the old semantics where if a user was listed in the
+ * file he was denied, otherwise he was allowed.
+ *
+ * Return 1 if the user is denied, or 0 if he is allowed.  */
+
+static int
+match(const char *pattern, const char *string)
+{
+#ifdef HAVE_FNMATCH
+    return fnmatch(pattern, string, FNM_NOESCAPE);
+#else
+    return strcmp(pattern, "*") != 0 && strcmp(pattern, string) != 0;
+#endif
+}
+
+static int
+checkaccess(char *name)
+{
+#define ALLOWED		0
+#define	NOT_ALLOWED	1
+    FILE *fd;
+    int allowed = ALLOWED;
+    char *user, *perm, line[BUFSIZ];
+    char *foo;
+    
+    fd = fopen(_PATH_FTPUSERS, "r");
+    
+    if(fd == NULL)
+	return allowed;
+
+    while (fgets(line, sizeof(line), fd) != NULL)  {
+	foo = NULL;
+	user = strtok_r(line, " \t\n", &foo);
+	if (user == NULL || user[0] == '#')
+	    continue;
+	perm = strtok_r(NULL, " \t\n", &foo);
+	if (match(user, name) == 0){
+	    if(perm && strcmp(perm, "allow") == 0)
+		allowed = ALLOWED;
+	    else
+		allowed = NOT_ALLOWED;
+	    break;
+	}
+    }
+    fclose(fd);
+    return allowed;
+}
+#undef	ALLOWED
+#undef	NOT_ALLOWED
+
+int do_login(int code, char *passwd)
+{
+        FILE *fd;
+	login_attempts = 0;		/* this time successful */
+	if (setegid((gid_t)pw->pw_gid) < 0) {
+		reply(550, "Can't set gid.");
+		return -1;
+	}
+	initgroups(pw->pw_name, pw->pw_gid);
+
+	/* open wtmp before chroot */
+	logwtmp(ttyline, pw->pw_name, remotehost);
+	logged_in = 1;
+
+	dochroot = checkuser(_PATH_FTPCHROOT, pw->pw_name);
+	if (guest) {
+		/*
+		 * We MUST do a chdir() after the chroot. Otherwise
+		 * the old current directory will be accessible as "."
+		 * outside the new root!
+		 */
+		if (chroot(pw->pw_dir) < 0 || chdir("/") < 0) {
+			reply(550, "Can't set guest privileges.");
+			return -1;
+		}
+	} else if (dochroot) {
+		if (chroot(pw->pw_dir) < 0 || chdir("/") < 0) {
+			reply(550, "Can't change root.");
+			return -1;
+		}
+	} else if (chdir(pw->pw_dir) < 0) {
+		if (chdir("/") < 0) {
+			reply(530, "User %s: can't change directory to %s.",
+			    pw->pw_name, pw->pw_dir);
+			return -1;
+		} else
+			lreply(code, "No directory! Logging in with home=/");
+	}
+	if (seteuid((uid_t)pw->pw_uid) < 0) {
+		reply(550, "Can't set uid.");
+		return -1;
+	}
+	/*
+	 * Display a login message, if it exists.
+	 * N.B. reply(code,) must follow the message.
+	 */
+	if ((fd = fopen(_PATH_FTPLOGINMESG, "r")) != NULL) {
+		char *cp, line[LINE_MAX];
+
+		while (fgets(line, sizeof(line), fd) != NULL) {
+			if ((cp = strchr(line, '\n')) != NULL)
+				*cp = '\0';
+			lreply(code, "%s", line);
+		}
+	}
+	if (guest) {
+		reply(code, "Guest login ok, access restrictions apply.");
+#ifdef HAVE_SETPROCTITLE
+		snprintf (proctitle, sizeof(proctitle),
+			  "%s: anonymous/%s",
+			  remotehost,
+			  passwd);
+#endif /* HAVE_SETPROCTITLE */
+		if (logging)
+			syslog(LOG_INFO, "ANONYMOUS FTP LOGIN FROM %s(%s), %s",
+			       remotehost, 
+			       inet_ntoa(his_addr.sin_addr),
+			       passwd);
+	} else {
+		reply(code, "User %s logged in.", pw->pw_name);
+#ifdef HAVE_SETPROCTITLE
+		snprintf(proctitle, sizeof(proctitle), "%s: %s", remotehost, pw->pw_name);
+		setproctitle(proctitle);
+#endif /* HAVE_SETPROCTITLE */
+		if (logging)
+			syslog(LOG_INFO, "FTP LOGIN FROM %s(%s) as %s",
+			       remotehost,
+			       inet_ntoa(his_addr.sin_addr),
+			       pw->pw_name);
+	}
+	umask(defumask);
+	return 0;
+}
+
+/*
+ * Terminate login as previous user, if any, resetting state;
+ * used when USER command is given or login fails.
+ */
+static void
+end_login(void)
+{
+
+	seteuid((uid_t)0);
+	if (logged_in)
+		logwtmp(ttyline, "", "");
+	pw = NULL;
+	logged_in = 0;
+	guest = 0;
+	dochroot = 0;
+}
+
+void
+pass(char *passwd)
+{
+	int rval;
+
+	/* some clients insists on sending a password */
+	if (logged_in && askpasswd == 0){
+	     reply(230, "Dumpucko!");
+	     return;
+	}
+
+	if (logged_in || askpasswd == 0) {
+		reply(503, "Login with USER first.");
+		return;
+	}
+	askpasswd = 0;
+	rval = 1;
+	if (!guest) {		/* "ftp" is only account allowed no password */
+		if (pw == NULL)
+			rval = 1;	/* failure below */
+		else if (otp_verify_user (&otp_ctx, passwd) == 0) {
+		    rval = 0;
+		} else if((auth_level & AUTH_OTP) == 0) {
+		    char realm[REALM_SZ];
+		    if((rval = krb_get_lrealm(realm, 1)) == KSUCCESS)
+			rval = krb_verify_user(pw->pw_name, "", realm, 
+					       passwd, 1, NULL);
+		    if (rval == KSUCCESS ){
+			if(k_hasafs())
+			    k_afsklog(0, 0);
+		    }else 
+			rval = unix_verify_user(pw->pw_name, passwd);
+		} else {
+		    char *s;
+		    
+		    if (s = otp_error(&otp_ctx))
+			lreply(530, "OTP: %s", s);
+		}
+		memset (passwd, 0, strlen(passwd));
+
+		/*
+		 * If rval == 1, the user failed the authentication
+		 * check above.  If rval == 0, either Kerberos or
+		 * local authentication succeeded.
+		 */
+		if (rval) {
+			reply(530, "Login incorrect.");
+			if (logging)
+				syslog(LOG_NOTICE,
+				    "FTP LOGIN FAILED FROM %s(%s), %s",
+				       remotehost,
+				       inet_ntoa(his_addr.sin_addr),
+				       curname);
+			pw = NULL;
+			if (login_attempts++ >= 5) {
+				syslog(LOG_NOTICE,
+				       "repeated login failures from %s(%s)",
+				       remotehost,
+				       inet_ntoa(his_addr.sin_addr));
+				exit(0);
+			}
+			return;
+		}
+	}
+	if(!do_login(230, passwd))
+	  return;
+	
+	/* Forget all about it... */
+	end_login();
+}
+
+void
+retrieve(char *cmd, char *name)
+{
+	FILE *fin = NULL, *dout;
+	struct stat st;
+	int (*closefunc) (FILE *);
+	char line[BUFSIZ];
+
+
+	if (cmd == 0) {
+		fin = fopen(name, "r");
+		closefunc = fclose;
+		st.st_size = 0;
+		if(fin == NULL){
+		    struct cmds {
+			char *ext;
+			char *cmd;
+		    } cmds[] = {
+			{".tar", "/bin/gtar cPf - %s"},
+			{".tar.gz", "/bin/gtar zcPf - %s"},
+			{".tar.Z", "/bin/gtar ZcPf - %s"},
+			{".gz", "/bin/gzip -c %s"},
+			{".Z", "/bin/compress -c %s"},
+			{NULL, NULL}
+		    };
+		    struct cmds *p;
+		    for(p = cmds; p->ext; p++){
+			char *tail = name + strlen(name) - strlen(p->ext);
+			char c = *tail;
+			
+			if(strcmp(tail, p->ext) == 0 &&
+			   (*tail  = 0) == 0 &&
+			   access(name, R_OK) == 0){
+			    snprintf (line, sizeof(line), p->cmd, name);
+			    *tail  = c;
+			    break;
+			}
+			*tail = c;
+		    }
+		    if(p->ext){
+			fin = ftpd_popen(line, "r", 0, 0);
+			closefunc = ftpd_pclose;
+			st.st_size = -1;
+			cmd = line;
+		    }
+		}
+	} else {
+		snprintf(line, sizeof(line), cmd, name);
+		name = line;
+		fin = ftpd_popen(line, "r", 1, 0);
+		closefunc = ftpd_pclose;
+		st.st_size = -1;
+	}
+	if (fin == NULL) {
+		if (errno != 0) {
+			perror_reply(550, name);
+			if (cmd == 0) {
+				LOGCMD("get", name);
+			}
+		}
+		return;
+	}
+	byte_count = -1;
+	if (cmd == 0){
+	    if(fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode)) {
+		reply(550, "%s: not a plain file.", name);
+		goto done;
+	    }
+	}
+	if (restart_point) {
+		if (type == TYPE_A) {
+			off_t i, n;
+			int c;
+
+			n = restart_point;
+			i = 0;
+			while (i++ < n) {
+				if ((c=getc(fin)) == EOF) {
+					perror_reply(550, name);
+					goto done;
+				}
+				if (c == '\n')
+					i++;
+			}
+		} else if (lseek(fileno(fin), restart_point, SEEK_SET) < 0) {
+			perror_reply(550, name);
+			goto done;
+		}
+	}
+	dout = dataconn(name, st.st_size, "w");
+	if (dout == NULL)
+		goto done;
+	set_buffer_size(fileno(dout), 0);
+	send_data(fin, dout);
+	fclose(dout);
+	data = -1;
+	pdata = -1;
+done:
+	if (cmd == 0)
+		LOGBYTES("get", name, byte_count);
+	(*closefunc)(fin);
+}
+
+/* filename sanity check */
+
+int 
+filename_check(char *filename)
+{
+  static const char good_chars[] = "+-=_,.";
+    char *p;
+
+    p = strrchr(filename, '/');
+    if(p)
+	filename = p + 1;
+
+    p = filename;
+
+    if(isalnum(*p)){
+	p++;
+	while(*p && (isalnum(*p) || strchr(good_chars, *p)))
+	    p++;
+	if(*p == '\0')
+	    return 0;
+    }
+    lreply(553, "\"%s\" is an illegal filename.", filename);
+    lreply(553, "The filename must start with an alphanumeric "
+	   "character and must only");
+    reply(553, "consist of alphanumeric characters or any of the following: %s", 
+	  good_chars);
+    return 1;
+}
+
+void
+do_store(char *name, char *mode, int unique)
+{
+	FILE *fout, *din;
+	struct stat st;
+	int (*closefunc) (FILE *);
+
+	if(guest && filename_check(name))
+	    return;
+	if (unique && stat(name, &st) == 0 &&
+	    (name = gunique(name)) == NULL) {
+		LOGCMD(*mode == 'w' ? "put" : "append", name);
+		return;
+	}
+
+	if (restart_point)
+		mode = "r+";
+	fout = fopen(name, mode);
+	closefunc = fclose;
+	if (fout == NULL) {
+		perror_reply(553, name);
+		LOGCMD(*mode == 'w' ? "put" : "append", name);
+		return;
+	}
+	byte_count = -1;
+	if (restart_point) {
+		if (type == TYPE_A) {
+			off_t i, n;
+			int c;
+
+			n = restart_point;
+			i = 0;
+			while (i++ < n) {
+				if ((c=getc(fout)) == EOF) {
+					perror_reply(550, name);
+					goto done;
+				}
+				if (c == '\n')
+					i++;
+			}
+			/*
+			 * We must do this seek to "current" position
+			 * because we are changing from reading to
+			 * writing.
+			 */
+			if (fseek(fout, 0L, SEEK_CUR) < 0) {
+				perror_reply(550, name);
+				goto done;
+			}
+		} else if (lseek(fileno(fout), restart_point, SEEK_SET) < 0) {
+			perror_reply(550, name);
+			goto done;
+		}
+	}
+	din = dataconn(name, (off_t)-1, "r");
+	if (din == NULL)
+		goto done;
+	set_buffer_size(fileno(din), 1);
+	if (receive_data(din, fout) == 0) {
+		if (unique)
+			reply(226, "Transfer complete (unique file name:%s).",
+			    name);
+		else
+			reply(226, "Transfer complete.");
+	}
+	fclose(din);
+	data = -1;
+	pdata = -1;
+done:
+	LOGBYTES(*mode == 'w' ? "put" : "append", name, byte_count);
+	(*closefunc)(fout);
+}
+
+static FILE *
+getdatasock(char *mode)
+{
+	int on = 1, s, t, tries;
+
+	if (data >= 0)
+		return (fdopen(data, mode));
+	seteuid((uid_t)0);
+	s = socket(AF_INET, SOCK_STREAM, 0);
+	if (s < 0)
+		goto bad;
+#if defined(SO_REUSEADDR) && defined(HAVE_SETSOCKOPT)
+	if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
+	    (void *) &on, sizeof(on)) < 0)
+		goto bad;
+#endif
+	/* anchor socket to avoid multi-homing problems */
+	data_source.sin_family = AF_INET;
+	data_source.sin_addr = ctrl_addr.sin_addr;
+	for (tries = 1; ; tries++) {
+		if (bind(s, (struct sockaddr *)&data_source,
+		    sizeof(data_source)) >= 0)
+			break;
+		if (errno != EADDRINUSE || tries > 10)
+			goto bad;
+		sleep(tries);
+	}
+	seteuid((uid_t)pw->pw_uid);
+#if defined(IP_TOS) && defined(HAVE_SETSOCKOPT)
+	on = IPTOS_THROUGHPUT;
+	if (setsockopt(s, IPPROTO_IP, IP_TOS, (void *)&on, sizeof(int)) < 0)
+		syslog(LOG_WARNING, "setsockopt (IP_TOS): %m");
+#endif
+	return (fdopen(s, mode));
+bad:
+	/* Return the real value of errno (close may change it) */
+	t = errno;
+	seteuid((uid_t)pw->pw_uid);
+	close(s);
+	errno = t;
+	return (NULL);
+}
+
+static FILE *
+dataconn(char *name, off_t size, char *mode)
+{
+	char sizebuf[32];
+	FILE *file;
+	int retry = 0, tos;
+
+	file_size = size;
+	byte_count = 0;
+	if (size != (off_t) -1)
+		snprintf(sizebuf, sizeof(sizebuf), " (%ld bytes)", size);
+	else
+		strcpy(sizebuf, "");
+	if (pdata >= 0) {
+		struct sockaddr_in from;
+		int s, fromlen = sizeof(from);
+
+		s = accept(pdata, (struct sockaddr *)&from, &fromlen);
+		if (s < 0) {
+			reply(425, "Can't open data connection.");
+			close(pdata);
+			pdata = -1;
+			return (NULL);
+		}
+		close(pdata);
+		pdata = s;
+#if defined(IP_TOS) && defined(HAVE_SETSOCKOPT)
+		tos = IPTOS_THROUGHPUT;
+		setsockopt(s, IPPROTO_IP, IP_TOS, (void *)&tos,
+		    sizeof(int));
+#endif
+		reply(150, "Opening %s mode data connection for '%s'%s.",
+		     type == TYPE_A ? "ASCII" : "BINARY", name, sizebuf);
+		return (fdopen(pdata, mode));
+	}
+	if (data >= 0) {
+		reply(125, "Using existing data connection for '%s'%s.",
+		    name, sizebuf);
+		usedefault = 1;
+		return (fdopen(data, mode));
+	}
+	if (usedefault)
+		data_dest = his_addr;
+	usedefault = 1;
+	file = getdatasock(mode);
+	if (file == NULL) {
+		reply(425, "Can't create data socket (%s,%d): %s.",
+		    inet_ntoa(data_source.sin_addr),
+		    ntohs(data_source.sin_port), strerror(errno));
+		return (NULL);
+	}
+	data = fileno(file);
+	while (connect(data, (struct sockaddr *)&data_dest,
+	    sizeof(data_dest)) < 0) {
+		if (errno == EADDRINUSE && retry < swaitmax) {
+			sleep((unsigned) swaitint);
+			retry += swaitint;
+			continue;
+		}
+		perror_reply(425, "Can't build data connection");
+		fclose(file);
+		data = -1;
+		return (NULL);
+	}
+	reply(150, "Opening %s mode data connection for '%s'%s.",
+	     type == TYPE_A ? "ASCII" : "BINARY", name, sizebuf);
+	return (file);
+}
+
+/*
+ * Tranfer the contents of "instr" to "outstr" peer using the appropriate
+ * encapsulation of the data subject * to Mode, Structure, and Type.
+ *
+ * NB: Form isn't handled.
+ */
+static void
+send_data(FILE *instr, FILE *outstr)
+{
+	int c, cnt, filefd, netfd;
+	static char *buf;
+	static size_t bufsize;
+	int i = 0;
+	char s[1024];
+
+	transflag++;
+	if (setjmp(urgcatch)) {
+		transflag = 0;
+		return;
+	}
+	switch (type) {
+
+	case TYPE_A:
+		while ((c = getc(instr)) != EOF) {
+		    byte_count++;
+		    if(i > 1022){
+			auth_write(fileno(outstr), s, i);
+			i = 0;
+		    }
+		    if(c == '\n')
+			s[i++] = '\r';
+		    s[i++] = c;
+		}
+		if(i)
+		    auth_write(fileno(outstr), s, i);
+		auth_write(fileno(outstr), s, 0);
+		fflush(outstr);
+		transflag = 0;
+		if (ferror(instr))
+			goto file_err;
+		if (ferror(outstr))
+			goto data_err;
+		reply(226, "Transfer complete.");
+		return;
+		
+	case TYPE_I:
+	case TYPE_L:
+#ifdef HAVE_MMAP
+#ifndef MAP_FAILED
+#define MAP_FAILED (-1)
+#endif
+	    {
+		struct stat st;
+		char *chunk;
+		int in = fileno(instr);
+		if(fstat(in, &st) == 0 && S_ISREG(st.st_mode)) {
+		    chunk = mmap(0, st.st_size, PROT_READ, MAP_SHARED, in, 0);
+		    if(chunk != (void *)MAP_FAILED) {
+			cnt = st.st_size - restart_point;
+			auth_write(fileno(outstr),
+				   chunk + restart_point,
+				   cnt);
+			munmap(chunk, st.st_size);
+			auth_write(fileno(outstr), NULL, 0);
+			byte_count = cnt;
+			transflag = 0;
+		    }
+		}
+	    }
+	
+#endif
+	if(transflag){
+	    struct stat st;
+
+	    netfd = fileno(outstr);
+	    filefd = fileno(instr);
+	    buf = alloc_buffer (buf, &bufsize,
+				fstat(filefd, &st) >= 0 ? &st : NULL);
+	    if (buf == NULL) {
+		transflag = 0;
+		perror_reply(451, "Local resource failure: malloc");
+		return;
+	    }
+	    while ((cnt = read(filefd, buf, bufsize)) > 0 &&
+		   auth_write(netfd, buf, cnt) == cnt)
+		byte_count += cnt;
+	    auth_write(netfd, buf, 0); /* to end an encrypted stream */
+	    transflag = 0;
+	    if (cnt != 0) {
+		if (cnt < 0)
+		    goto file_err;
+		goto data_err;
+	    }
+	}
+	reply(226, "Transfer complete.");
+	return;
+	default:
+	    transflag = 0;
+	    reply(550, "Unimplemented TYPE %d in send_data", type);
+	    return;
+	}
+
+data_err:
+	transflag = 0;
+	perror_reply(426, "Data connection");
+	return;
+
+file_err:
+	transflag = 0;
+	perror_reply(551, "Error on input file");
+}
+
+/*
+ * Transfer data from peer to "outstr" using the appropriate encapulation of
+ * the data subject to Mode, Structure, and Type.
+ *
+ * N.B.: Form isn't handled.
+ */
+static int
+receive_data(FILE *instr, FILE *outstr)
+{
+    int cnt, bare_lfs = 0;
+    static char *buf;
+    static size_t bufsize;
+    struct stat st;
+
+    transflag++;
+    if (setjmp(urgcatch)) {
+	transflag = 0;
+	return (-1);
+    }
+
+    buf = alloc_buffer (buf, &bufsize,
+			fstat(fileno(outstr), &st) >= 0 ? &st : NULL);
+    if (buf == NULL) {
+	transflag = 0;
+	perror_reply(451, "Local resource failure: malloc");
+	return -1;
+    }
+    
+    switch (type) {
+
+    case TYPE_I:
+    case TYPE_L:
+	while ((cnt = auth_read(fileno(instr), buf, bufsize)) > 0) {
+	    if (write(fileno(outstr), buf, cnt) != cnt)
+		goto file_err;
+	    byte_count += cnt;
+	}
+	if (cnt < 0)
+	    goto data_err;
+	transflag = 0;
+	return (0);
+
+    case TYPE_E:
+	reply(553, "TYPE E not implemented.");
+	transflag = 0;
+	return (-1);
+
+    case TYPE_A:
+    {
+	char *p, *q;
+	int cr_flag = 0;
+	while ((cnt = auth_read(fileno(instr),
+				buf + cr_flag, 
+				bufsize - cr_flag)) > 0){
+	    byte_count += cnt;
+	    cnt += cr_flag;
+	    cr_flag = 0;
+	    for(p = buf, q = buf; p < buf + cnt;) {
+		if(*p == '\n')
+		    bare_lfs++;
+		if(*p == '\r')
+		    if(p == buf + cnt - 1){
+			cr_flag = 1;
+			p++;
+			continue;
+		    }else if(p[1] == '\n'){
+			*q++ = '\n';
+			p += 2;
+			continue;
+		    }
+		*q++ = *p++;
+	    }
+	    fwrite(buf, q - buf, 1, outstr);
+	    if(cr_flag)
+		buf[0] = '\r';
+	}
+	if(cr_flag)
+	    putc('\r', outstr);
+	fflush(outstr);
+	if (ferror(instr))
+	    goto data_err;
+	if (ferror(outstr))
+	    goto file_err;
+	transflag = 0;
+	if (bare_lfs) {
+	    lreply(226, "WARNING! %d bare linefeeds received in ASCII mode\r\n"
+		   "    File may not have transferred correctly.\r\n",
+		   bare_lfs);
+	}
+	return (0);
+    }
+    default:
+	reply(550, "Unimplemented TYPE %d in receive_data", type);
+	transflag = 0;
+	return (-1);
+    }
+	
+data_err:
+    transflag = 0;
+    perror_reply(426, "Data Connection");
+    return (-1);
+	
+file_err:
+    transflag = 0;
+    perror_reply(452, "Error writing file");
+    return (-1);
+}
+
+void
+statfilecmd(char *filename)
+{
+	FILE *fin;
+	int c;
+	char line[LINE_MAX];
+
+	snprintf(line, sizeof(line), "/bin/ls -la %s", filename);
+	fin = ftpd_popen(line, "r", 1, 0);
+	lreply(211, "status of %s:", filename);
+	while ((c = getc(fin)) != EOF) {
+		if (c == '\n') {
+			if (ferror(stdout)){
+				perror_reply(421, "control connection");
+				ftpd_pclose(fin);
+				dologout(1);
+				/* NOTREACHED */
+			}
+			if (ferror(fin)) {
+				perror_reply(551, filename);
+				ftpd_pclose(fin);
+				return;
+			}
+			putc('\r', stdout);
+		}
+		putc(c, stdout);
+	}
+	ftpd_pclose(fin);
+	reply(211, "End of Status");
+}
+
+void
+statcmd(void)
+{
+#if 0
+	struct sockaddr_in *sin;
+	u_char *a, *p;
+
+	lreply(211, "%s FTP server status:", hostname, version);
+	printf("     %s\r\n", version);
+	printf("     Connected to %s", remotehost);
+	if (!isdigit(remotehost[0]))
+		printf(" (%s)", inet_ntoa(his_addr.sin_addr));
+	printf("\r\n");
+	if (logged_in) {
+		if (guest)
+			printf("     Logged in anonymously\r\n");
+		else
+			printf("     Logged in as %s\r\n", pw->pw_name);
+	} else if (askpasswd)
+		printf("     Waiting for password\r\n");
+	else
+		printf("     Waiting for user name\r\n");
+	printf("     TYPE: %s", typenames[type]);
+	if (type == TYPE_A || type == TYPE_E)
+		printf(", FORM: %s", formnames[form]);
+	if (type == TYPE_L)
+#if NBBY == 8
+		printf(" %d", NBBY);
+#else
+		printf(" %d", bytesize);	/* need definition! */
+#endif
+	printf("; STRUcture: %s; transfer MODE: %s\r\n",
+	    strunames[stru], modenames[mode]);
+	if (data != -1)
+		printf("     Data connection open\r\n");
+	else if (pdata != -1) {
+		printf("     in Passive mode");
+		sin = &pasv_addr;
+		goto printaddr;
+	} else if (usedefault == 0) {
+		printf("     PORT");
+		sin = &data_dest;
+printaddr:
+		a = (u_char *) &sin->sin_addr;
+		p = (u_char *) &sin->sin_port;
+#define UC(b) (((int) b) & 0xff)
+		printf(" (%d,%d,%d,%d,%d,%d)\r\n", UC(a[0]),
+			UC(a[1]), UC(a[2]), UC(a[3]), UC(p[0]), UC(p[1]));
+#undef UC
+	} else
+		printf("     No data connection\r\n");
+#endif
+	reply(211, "End of status");
+}
+
+void
+fatal(char *s)
+{
+
+	reply(451, "Error in server: %s\n", s);
+	reply(221, "Closing connection due to server error.");
+	dologout(0);
+	/* NOTREACHED */
+}
+
+static void
+int_reply(int, char *, const char *, va_list)
+#ifdef __GNUC__
+__attribute__ ((format (printf, 3, 0)))
+#endif
+;
+
+static void
+int_reply(int n, char *c, const char *fmt, va_list ap)
+{
+  char buf[10240];
+  char *p;
+  p=buf;
+  if(n){
+      snprintf(p, sizeof(buf), "%d%s", n, c);
+      p+=strlen(p);
+  }
+  vsnprintf(p, sizeof(buf) - strlen(p), fmt, ap);
+  p+=strlen(p);
+  snprintf(p, sizeof(buf) - strlen(p), "\r\n");
+  p+=strlen(p);
+  auth_printf("%s", buf);
+  fflush(stdout);
+  if (debug)
+    syslog(LOG_DEBUG, "<--- %s- ", buf);
+}
+
+void
+reply(int n, const char *fmt, ...)
+{
+  va_list ap;
+  va_start(ap, fmt);
+  int_reply(n, " ", fmt, ap);
+  delete_ftp_command();
+  va_end(ap);
+}
+
+void
+lreply(int n, const char *fmt, ...)
+{
+  va_list ap;
+  va_start(ap, fmt);
+  int_reply(n, "-", fmt, ap);
+  va_end(ap);
+}
+
+void
+nreply(const char *fmt, ...)
+{
+  va_list ap;
+  va_start(ap, fmt);
+  int_reply(0, NULL, fmt, ap);
+  va_end(ap);
+}
+
+static void
+ack(char *s)
+{
+
+	reply(250, "%s command successful.", s);
+}
+
+void
+nack(char *s)
+{
+
+	reply(502, "%s command not implemented.", s);
+}
+
+/* ARGSUSED */
+void
+yyerror(char *s)
+{
+	char *cp;
+
+	if ((cp = strchr(cbuf,'\n')))
+		*cp = '\0';
+	reply(500, "'%s': command not understood.", cbuf);
+}
+
+void
+do_delete(char *name)
+{
+	struct stat st;
+
+	LOGCMD("delete", name);
+	if (stat(name, &st) < 0) {
+		perror_reply(550, name);
+		return;
+	}
+	if ((st.st_mode&S_IFMT) == S_IFDIR) {
+		if (rmdir(name) < 0) {
+			perror_reply(550, name);
+			return;
+		}
+		goto done;
+	}
+	if (unlink(name) < 0) {
+		perror_reply(550, name);
+		return;
+	}
+done:
+	ack("DELE");
+}
+
+void
+cwd(char *path)
+{
+
+	if (chdir(path) < 0)
+		perror_reply(550, path);
+	else
+		ack("CWD");
+}
+
+void
+makedir(char *name)
+{
+
+	LOGCMD("mkdir", name);
+	if(guest && filename_check(name))
+	    return;
+	if (mkdir(name, 0777) < 0)
+		perror_reply(550, name);
+	else{
+	    if(guest)
+		chmod(name, 0700); /* guest has umask 777 */
+	    reply(257, "MKD command successful.");
+	}
+}
+
+void
+removedir(char *name)
+{
+
+	LOGCMD("rmdir", name);
+	if (rmdir(name) < 0)
+		perror_reply(550, name);
+	else
+		ack("RMD");
+}
+
+void
+pwd(void)
+{
+    char path[MaxPathLen + 1];
+    char *ret;
+
+    /* SunOS has a broken getcwd that does popen(pwd) (!!!), this
+     * failes miserably when running chroot 
+     */
+    ret = getcwd(path, sizeof(path));
+    if (ret == NULL)
+	reply(550, "%s.", strerror(errno));
+    else
+	reply(257, "\"%s\" is current directory.", path);
+}
+
+char *
+renamefrom(char *name)
+{
+	struct stat st;
+
+	if (stat(name, &st) < 0) {
+		perror_reply(550, name);
+		return NULL;
+	}
+	reply(350, "File exists, ready for destination name");
+	return (name);
+}
+
+void
+renamecmd(char *from, char *to)
+{
+
+	LOGCMD2("rename", from, to);
+	if(guest && filename_check(to))
+	    return;
+	if (rename(from, to) < 0)
+		perror_reply(550, "rename");
+	else
+		ack("RNTO");
+}
+
+static void
+dolog(struct sockaddr_in *sin)
+{
+	inaddr2str (sin->sin_addr, remotehost, sizeof(remotehost));
+#ifdef HAVE_SETPROCTITLE
+	snprintf(proctitle, sizeof(proctitle), "%s: connected", remotehost);
+	setproctitle(proctitle);
+#endif /* HAVE_SETPROCTITLE */
+
+	if (logging)
+		syslog(LOG_INFO, "connection from %s(%s)",
+		       remotehost,
+		       inet_ntoa(his_addr.sin_addr));
+}
+
+/*
+ * Record logout in wtmp file
+ * and exit with supplied status.
+ */
+void
+dologout(int status)
+{
+    transflag = 0;
+    if (logged_in) {
+	seteuid((uid_t)0);
+	logwtmp(ttyline, "", "");
+	dest_tkt();
+	if(k_hasafs())
+	    k_unlog();
+    }
+    /* beware of flushing buffers after a SIGPIPE */
+#ifdef XXX
+    exit(status);
+#else
+    _exit(status);
+#endif	
+}
+
+void abor(void)
+{
+}
+
+static void
+myoob(int signo)
+{
+#if 0
+	char *cp;
+#endif
+
+	/* only process if transfer occurring */
+	if (!transflag)
+		return;
+
+	/* This is all XXX */
+	oobflag = 1;
+	/* if the command resulted in a new command, 
+	   parse that as well */
+	do{
+	    yyparse();
+	} while(ftp_command);
+	oobflag = 0;
+
+#if 0 
+	cp = tmpline;
+	if (getline(cp, 7) == NULL) {
+		reply(221, "You could at least say goodbye.");
+		dologout(0);
+	}
+	upper(cp);
+	if (strcmp(cp, "ABOR\r\n") == 0) {
+		tmpline[0] = '\0';
+		reply(426, "Transfer aborted. Data connection closed.");
+		reply(226, "Abort successful");
+		longjmp(urgcatch, 1);
+	}
+	if (strcmp(cp, "STAT\r\n") == 0) {
+		if (file_size != (off_t) -1)
+			reply(213, "Status: %ld of %ld bytes transferred",
+			      (long)byte_count,
+			      (long)file_size);
+		else
+			reply(213, "Status: %ld bytes transferred"
+			      (long)byte_count);
+	}
+#endif
+}
+
+/*
+ * Note: a response of 425 is not mentioned as a possible response to
+ *	the PASV command in RFC959. However, it has been blessed as
+ *	a legitimate response by Jon Postel in a telephone conversation
+ *	with Rick Adams on 25 Jan 89.
+ */
+void
+passive(void)
+{
+	int len;
+	char *p, *a;
+
+	pdata = socket(AF_INET, SOCK_STREAM, 0);
+	if (pdata < 0) {
+		perror_reply(425, "Can't open passive connection");
+		return;
+	}
+	pasv_addr = ctrl_addr;
+	pasv_addr.sin_port = 0;
+	seteuid((uid_t)0);
+	if (bind(pdata, (struct sockaddr *)&pasv_addr, sizeof(pasv_addr)) < 0) {
+		seteuid((uid_t)pw->pw_uid);
+		goto pasv_error;
+	}
+	seteuid((uid_t)pw->pw_uid);
+	len = sizeof(pasv_addr);
+	if (getsockname(pdata, (struct sockaddr *) &pasv_addr, &len) < 0)
+		goto pasv_error;
+	if (listen(pdata, 1) < 0)
+		goto pasv_error;
+	a = (char *) &pasv_addr.sin_addr;
+	p = (char *) &pasv_addr.sin_port;
+
+#define UC(b) (((int) b) & 0xff)
+
+	reply(227, "Entering Passive Mode (%d,%d,%d,%d,%d,%d)", UC(a[0]),
+		UC(a[1]), UC(a[2]), UC(a[3]), UC(p[0]), UC(p[1]));
+	return;
+
+pasv_error:
+	close(pdata);
+	pdata = -1;
+	perror_reply(425, "Can't open passive connection");
+	return;
+}
+
+/*
+ * Generate unique name for file with basename "local".
+ * The file named "local" is already known to exist.
+ * Generates failure reply on error.
+ */
+static char *
+gunique(char *local)
+{
+	static char new[MaxPathLen];
+	struct stat st;
+	int count;
+	char *cp;
+
+	cp = strrchr(local, '/');
+	if (cp)
+		*cp = '\0';
+	if (stat(cp ? local : ".", &st) < 0) {
+		perror_reply(553, cp ? local : ".");
+		return NULL;
+	}
+	if (cp)
+		*cp = '/';
+	for (count = 1; count < 100; count++) {
+		snprintf (new, sizeof(new), "%s.%d", local, count);
+		if (stat(new, &st) < 0)
+			return (new);
+	}
+	reply(452, "Unique file name cannot be created.");
+	return (NULL);
+}
+
+/*
+ * Format and send reply containing system error number.
+ */
+void
+perror_reply(int code, char *string)
+{
+	reply(code, "%s: %s.", string, strerror(errno));
+}
+
+static char *onefile[] = {
+	"",
+	0
+};
+
+void
+send_file_list(char *whichf)
+{
+  struct stat st;
+  DIR *dirp = NULL;
+  struct dirent *dir;
+  FILE *dout = NULL;
+  char **dirlist, *dirname;
+  int simple = 0;
+  int freeglob = 0;
+  glob_t gl;
+  char buf[MaxPathLen];
+
+  if (strpbrk(whichf, "~{[*?") != NULL) {
+    int flags = GLOB_BRACE|GLOB_NOCHECK|GLOB_QUOTE|GLOB_TILDE;
+
+    memset(&gl, 0, sizeof(gl));
+    freeglob = 1;
+    if (glob(whichf, flags, 0, &gl)) {
+      reply(550, "not found");
+      goto out;
+    } else if (gl.gl_pathc == 0) {
+      errno = ENOENT;
+      perror_reply(550, whichf);
+      goto out;
+    }
+    dirlist = gl.gl_pathv;
+  } else {
+    onefile[0] = whichf;
+    dirlist = onefile;
+    simple = 1;
+  }
+
+  if (setjmp(urgcatch)) {
+    transflag = 0;
+    goto out;
+  }
+  while ((dirname = *dirlist++)) {
+    if (stat(dirname, &st) < 0) {
+      /*
+       * If user typed "ls -l", etc, and the client
+       * used NLST, do what the user meant.
+       */
+      if (dirname[0] == '-' && *dirlist == NULL &&
+	  transflag == 0) {
+	retrieve("/bin/ls %s", dirname);
+	goto out;
+      }
+      perror_reply(550, whichf);
+      if (dout != NULL) {
+	fclose(dout);
+	transflag = 0;
+	data = -1;
+	pdata = -1;
+      }
+      goto out;
+    }
+
+    if (S_ISREG(st.st_mode)) {
+      if (dout == NULL) {
+	dout = dataconn("file list", (off_t)-1, "w");
+	if (dout == NULL)
+	  goto out;
+	transflag++;
+      }
+      snprintf(buf, sizeof(buf), "%s%s\n", dirname,
+	      type == TYPE_A ? "\r" : "");
+      auth_write(fileno(dout), buf, strlen(buf));
+      byte_count += strlen(dirname) + 1;
+      continue;
+    } else if (!S_ISDIR(st.st_mode))
+      continue;
+
+    if ((dirp = opendir(dirname)) == NULL)
+      continue;
+
+    while ((dir = readdir(dirp)) != NULL) {
+      char nbuf[MaxPathLen];
+
+      if (!strcmp(dir->d_name, "."))
+	continue;
+      if (!strcmp(dir->d_name, ".."))
+	continue;
+
+      snprintf(nbuf, sizeof(nbuf), "%s/%s", dirname, dir->d_name);
+
+      /*
+       * We have to do a stat to insure it's
+       * not a directory or special file.
+       */
+      if (simple || (stat(nbuf, &st) == 0 &&
+		     S_ISREG(st.st_mode))) {
+	if (dout == NULL) {
+	  dout = dataconn("file list", (off_t)-1, "w");
+	  if (dout == NULL)
+	    goto out;
+	  transflag++;
+	}
+	if(strncmp(nbuf, "./", 2) == 0)
+	  snprintf(buf, sizeof(buf), "%s%s\n", nbuf +2,
+		   type == TYPE_A ? "\r" : "");
+	else
+	  snprintf(buf, sizeof(buf), "%s%s\n", nbuf,
+		   type == TYPE_A ? "\r" : "");
+	auth_write(fileno(dout), buf, strlen(buf));
+	byte_count += strlen(nbuf) + 1;
+      }
+    }
+    closedir(dirp);
+  }
+  if (dout == NULL)
+    reply(550, "No files found.");
+  else if (ferror(dout) != 0)
+    perror_reply(550, "Data connection");
+  else
+    reply(226, "Transfer complete.");
+
+  transflag = 0;
+  if (dout != NULL){
+    auth_write(fileno(dout), buf, 0); /* XXX flush */
+	    
+    fclose(dout);
+  }
+  data = -1;
+  pdata = -1;
+out:
+  if (freeglob) {
+    freeglob = 0;
+    globfree(&gl);
+  }
+}
+
+
+int
+find(char *pattern)
+{
+    char line[1024];
+    FILE *f;
+
+    snprintf(line, sizeof(line),
+	     "/bin/locate -d %s %s",
+	     ftp_rooted("/etc/locatedb"),
+	     pattern);
+    f = ftpd_popen(line, "r", 1, 1);
+    if(f == NULL){
+	perror_reply(550, "/bin/locate");
+	return 1;
+    }
+    lreply(200, "Output from find.");
+    while(fgets(line, sizeof(line), f)){
+	if(line[strlen(line)-1] == '\n')
+	    line[strlen(line)-1] = 0;
+	nreply("%s", line);
+    }
+    reply(200, "Done");
+    ftpd_pclose(f);
+    return 0;
+}
+